CN104975475A - Self-cleaning method for filter net used for washing machine and washing machine - Google Patents

Abstract

The invention discloses a self-cleaning method for a filter screen of a washing machine and a washing machine. The washing machine includes an outer barrel of the washing machine and a filter device. The filter device includes a filter chamber and a filter barrel arranged in the filter chamber. The filter chamber It is provided with a filter water inlet, a filter outlet for discharging the filtered water to the outer barrel, and a sewage discharge port for discharging the sewage from the cleaned filter screen to the outside. The two ends of the filter barrel are pivotally connected with the filter chamber, and one end is The water outlet joint is rotated, and the shaft at the other end is sealed, and the filter water outlet communicates with the inside of the filter barrel through the rotating water outlet joint. The invention removes filter dirt on the surface of the filter net by driving the filter barrels in different rotation modes. The self-cleaning of the filter screen of the present invention improves the degree of automation, the cleaning method is simple, and the cleaning effect is more obvious when the filter barrel is sprayed with clean water, and the water circulation efficiency is improved.

Description

Self-cleaning method of filter screen for washing machine and washing machine

technical field

The invention relates to washing machine circulating water treatment equipment, in particular to a washing machine filter screen self-cleaning method and a washing machine.

Background technique

With the improvement of people's living standards, the washing machine has become one of the main household appliances in people's daily life. The washing process of the washing machine mainly includes several stages of washing, rinsing and drying. After entering the rinsing stage, in order to rinse off the stains and residual detergent, it is necessary to enter more water or perform more rinsing times to rinse the clothes, which will consume a lot of water resources, even if it is a water-saving drum washing machine. Clothes also need to be rinsed at least twice, and this process consumes at least 30L of tap water. Sometimes there are less stains on the clothes or less detergent is put in, and it may be rinsed clean twice, but because the user chooses 3 rinses, it will inevitably cause waste of water resources. For example, a 6Kg fully automatic washing machine usually rinses twice. The basic water consumption for rinsing is about 100 liters. How to save water and electricity while washing clothes has always been one of the focuses of consumers.

So far, there is no water purification and recycling device for household washing machines. Even so-called washing machines with water-saving functions generally install water storage tanks on the side of the washing machine, and use water pumps for water injection and drainage. Generally, water can be filled at one time. Rinse 3 times to save water. But the water after washing cannot be preserved, and the structure of the washing machine itself is complicated and huge, which is unfavorable for transportation, recycling and so on. Due to limitations in volume, structure, and flexibility, the original functions of the washing machine and the full play of the functions of the water-saving tank itself have been affected.

In order to better save water resources on the basis of existing laundry methods, many manufacturers have invested a lot of research and development to produce washing machines with water purification and recycling devices and water-saving functions.

At the same time, as the flocculation technology gradually matures, it is gradually applied and promoted in the industrial field. The water-saving washing machine that adopts flocculation principle to make has just become the research and development focus of each washing machine manufacturer. However, due to the existing filter device, with the operation of the filter program, a large amount of flocs will be attached to the filter screen, which will reduce the filtration efficiency of the filter device; at the same time, it is inconvenient to clean the flocs left by filtering in the filter device, so it is not suitable for For direct use in the field of washing equipment.

In view of this, the present invention is proposed.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a convenient and reliable self-cleaning method for the filter screen of the washing machine.

Another object of the present invention is to provide a washing machine with simple structure, good filtering effect and the above self-cleaning method.

In order to solve the above-mentioned technical problems, the basic idea of the technical solution adopted by the present invention is: a self-cleaning method for the filter screen of a washing machine, the filter screen is arranged on the surface of the filter bucket, and the filter bucket is rotatably installed in the filter chamber, and the filter screen is driven to filter The barrel rotates in different ways to remove filter dirt from the filter surface.

Further, the different rotation modes of driving the filter barrel are the change of the rotational speed of the driven filter barrel and/or the change of the turn-to-stop ratio and/or the switching of the rotation direction and/or the change of the acceleration of the driven filter barrel.

Further, the filter barrel is driven to rotate by a motor.

Further, the filter barrel is driven to vibrate by controlling the motor in a jogging or shaking manner so that the filter dirt on the surface of the filter screen falls off.

Further, the filter bucket is driven to rotate by the incoming water flow.

Further, the filter screen is sprayed and cleaned while the filter bucket is driven to rotate by the water inflow.

Further, controlling the change of the inlet water pressure and/or the start and stop of the inlet water and/or the different angles of the inlet water flushing the filter tub realizes different rotation modes of the filter tub.

Further, in the process of driving the filter bucket to rotate, the filter screen is cleaned by spraying water.

Preferably, the time for cleaning the filter screen is not longer than the time for the filter barrel to rotate; more preferably, first drive the filter barrel to rotate to shake/throw away the larger filter dirt from the filter screen, and then clean the filter screen with water. At this time, the water for cleaning the filter screen is stirred by the rotating filter barrel and splashes around the filter chamber, which can clean the inner wall of the filter chamber.

The above scheme is further, after the set time for cleaning the filter screen with water, the cleaning water is discharged, and the filter barrel is driven to continue to rotate for a period of time, and the water on the filter screen is dried. Due to the rotation of the filter barrel, the filter chamber is slightly shaken, and the filter chamber is The remaining water droplets in the room are completely discharged to realize the drying of the filter chamber and avoid the growth of bacteria.

The present invention includes at least two levels of self-cleaning methods. The first self-cleaning method is to drive the filter barrel to vibrate the filter dirt from the surface of the filter net by shaking or jogging;

The second self-cleaning mode is to drive the filter barrel to switch forward and reverse; The degree of clogging of the filter corresponding to the cleaning method.

The washing machine according to the present invention comprises a washing machine outer tub and a filter device, the filter device includes a filter chamber and a filter bucket arranged in the filter chamber, the filter chamber is provided with a filter water inlet, and the filtered water is The filter outlet that is discharged to the outer barrel and the sewage outlet that discharges the sewage from the cleaned filter to the outside. The two ends of the filter barrel are pivotally connected to the filter chamber, one end is a rotating water outlet joint, and the other end is shaft-sealed. The water outlet communicates with the inside of the filter bucket through the rotating water outlet joint.

Further, a flocculation device is provided between the outer tub of the washing machine and the filter device. The flocculation device includes a flocculation chamber communicated with the outer tub, and is drained from the outer tub to the flocculation chamber for flocculation treatment; the flocculation chamber communicates with the filter chamber, and the flocculation The water after the flocculation treatment of the device enters the filter chamber, is filtered by the filter barrel, and then discharged into the outer barrel for recycling.

Further, the axis of rotation of the filter barrel and the horizontal plane have an inclined angle α, 0≤α≤30°, and the rotating water outlet joint is set at the lower end of the filter barrel; by tilting or horizontally placing the filter barrel, not only can increase Large filter area, faster filter speed, and facilitate filter cleaning.

Alternatively, the filter bucket is vertically arranged in the filter chamber, and the rotary outlet joint is arranged at the bottom end. This structure has a better effect on the rotation of the filter screen or the vibration of flocs falling off; in addition, combined with water flow washing, the speed of water scouring the filter screen can be effectively used, and the filter screen can be cleaned more cleanly.

The circulating water treatment method of the washing machine of the present invention is as follows: after washing, the drain water is flocculated through the flocculation device, filtered by the filter device, and then discharged into the outer bucket for rinsing, and the above water treatment process is circulated until the rinsing is completed, and the filter bucket is driven to rotate , start to clean the flocs on the surface of the filter screen; further clean the filter device with clean water to make the cleaning effect better.

The water flow path of circulating water filtration is: enter the water from the filter water inlet to the filter chamber, at this time, the incoming water is filtered through the filter screen on the surface of the filter barrel in the filter chamber, and then discharged from the filter outlet connected to the inside of the filter barrel. The flocs are filtered by the filter screen outside the filter bucket.

The self-cleaning process of the filter screen is as follows: close the filter water outlet, and drive the filter barrel to rotate. This driving method is driven by a motor or fresh water, and the filter barrel is driven in different rotation modes. Throwing away from the surface of the filter screen will also drive the water flow in the filter chamber during the rotation of the filter bucket, and the moving water flow can also help to wash the surface of the filter screen, and friction will also be generated between the water flow and the filter screen during this process. Filter cleaning. After the filter screen is cleaned, open the sewage outlet to drain water. At this time, the rotation of the filter bucket is not only beneficial to mixing and discharging the flocs with water, but also can dry the filter screen.

The main principle of the self-cleaning filter device of the present invention is to use the vibration and rotation of the filter screen to shed the flocs on the filter screen, and further, use the water flow to wash away the flocs and fine particles sticking to the filter screen, and the filter barrel rotates During the process, the filter screen and the water in the filter chamber are agitated to realize cleaning, and finally solve the problems of sticking net and clogging during floc filtration.

After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

The washing machine of the present invention adopts filter cycle water-saving equipment, which can save water resources; the filter device realizes self-cleaning, eliminating the steps of manually cleaning the filter device, and using the rotation of the filter barrel to shake or vibrate the filter dirt away from the filter net, thereby improving The degree of automation is improved, the cleaning method is simple, and the cleaning effect is more obvious when the filter barrel is sprayed with clean water, and the water circulation efficiency is improved.

Description of drawings

Fig. 1 is a schematic structural view of the filtering device of the present invention;

Fig. 2 is a schematic diagram of another filter device of the present invention;

Fig. 3 is the A-A direction view of Fig. 2;

Fig. 4 is the B-B direction view of Fig. 2;

Fig. 5 is a schematic diagram of the cooperation structure of the filtering device and the tubular nozzle according to the present invention;

Fig. 6 is a schematic diagram of the circulating water treatment of the washing machine according to the present invention.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

The invention provides a method for self-cleaning the filter screen of a washing machine. The method can quickly and effectively clean the filter screen when the filter screen is completely or partially blocked by filtering dirt.

As shown in Figures 1 to 5, the filter screen 1 of the present invention is arranged on the surface of the filter bucket 2, and the filter bucket 2 is rotatably arranged in the filter chamber 3, and the filter screen 1 is removed by driving the filter bucket 2 in different rotation modes. Surface filter dirt. The different rotation modes of driving the filter barrel are the change of the rotational speed of the driven filter barrel 2 and/or the change of the turn-to-stop ratio and/or the switching of the rotation direction and/or the change of the acceleration of the driven filter barrel 2 .

The present invention can drive the filter bucket 2 to rotate through the motor 4 or the incoming water flow.

Embodiment one

In this embodiment, during the process of driving the filter barrel 2 to rotate, further, the filter screen can be cleaned by spraying water, as shown in FIG. 5 , a water spraying device is provided in the filter chamber 3 . Preferably, the time for cleaning the filter screen 1 is not longer than the time for the filter barrel 2 to rotate; more preferably, first drive the filter barrel 2 to rotate to shake/throw away the larger filter dirt from the filter screen 1, and then enter water to clean and filter The less filter dirt on the surface of the net 1, the water for cleaning the filter screen is stirred by the rotating filter bucket 2, and splashes around the filter chamber 3, which can clean the filter chamber 3 inner walls.

The above scheme is further, after entering the water to clean the filter screen 1 for a set time, the cleaning water is discharged, and the filter bucket 2 is driven to continue to rotate for a period of time, and the water on the filter screen 1 is dried. Due to the rotation of the filter bucket 2, the filter chamber is driven 3 micro-vibration completely discharges the remaining water droplets in the filter chamber 3, realizes the drying of the filter chamber 3, and avoids the growth of bacteria.

Embodiment two

As shown in Figure 1, the filter barrel 2 of this embodiment is driven by a motor 4 to rotate, and the filter barrel 2 is driven to vibrate by controlling the motor 4 to jog or shake to make the filter dirt on the surface of the filter screen 1 fall off; specifically, it can be The start or stop of the motor 4 is intermittently controlled to realize the inching of the motor 4. In addition, the motor 4 will vibrate when the motor 4 is started.

Further, by controlling the change of the rotation speed of the motor 4 or the switching of the rotation direction, the filtered dirt is thrown away from the surface of the filter screen 1 . For example, the motor rotates forward for 0-10 minutes, and reverses for 0-10 minutes; the turn-to-stop ratio is not greater than 10%-20% of the rotation time; or rotates at a set speed, such as a speed above 60 rpm.

Embodiment three

As shown in FIG. 2 to FIG. 4 , in this embodiment, the incoming water flow is used to drive the filter barrel 2 to rotate, and at the same time, the incoming water flow can be used to spray and clean the filter screen 1 .

Specifically, the direction of water spraying corresponds to the circumferential direction of filter barrel 2 rotation; if the filter barrel 2 needs to be reversed, the direction of water spraying can be set to correspond to the circumferential direction of forward and reverse rotation of filter barrel 2 , to drive the rotation direction of the filter bucket 2 by switching the water inlet direction.

Further, controlling the change of the inlet water pressure and/or the start and stop of the inlet water and/or the different angles of the inlet water flushing the filter tub realizes different rotation modes of the filter tub.

Embodiment four

As shown in Fig. 2 to Fig. 4, the structure for driving the filter barrel 2 to rotate by the incoming water flow includes a nozzle 5, which is installed on the filter chamber 3, and the spray direction acts on the surface of the filter barrel 2 to drive the filter barrel 2 to rotate. The spraying direction of the nozzle 5 is close to the direction tangent to the rotation of the filter barrel. Since the filter barrel is inclined at a small angle to the horizontal plane, the water spray pressure and gravity act on the surface of the filter barrel to increase the impact force driving the filter barrel to rotate.

Further, in order to enhance the rotation efficiency of the filter bucket 2 driven by the incoming water flow, paddles 6 are provided on the surface of the filter bucket 2 corresponding to the spraying angle (see Figure 1), and the paddles 6 are set corresponding to the spraying direction of the nozzle 5 to transmit the water flow The power that drives the filter barrel to rotate.

Embodiment five

As shown in FIG. 5 , the spray head 5 described in this embodiment is a tubular structure with one end closed and the other end connected to the cleaning water. The peripheral wall of the spray head 5 is provided with a water spray port 50 along the axial direction. The shape of the water spout 50 is circular, elliptical, strip-shaped, etc. The length of the nozzle 5 should ensure that the width of the sprayed water flow is enough to cover the axial length range of the entire filter screen 1.

The tubular nozzle 5 can be provided in multiples, distributed on the side wall of the filter chamber 3, and arranged parallel to the axial direction of the rotation of the filter barrel 2.

Embodiment six

According to the clogging degree of the filter screen, this embodiment is equipped with two levels of self-cleaning methods. The first self-cleaning method is to drive the filter barrel 2 to vibrate the filtered dirt from the surface of the filter screen 1 by shaking or jogging;

The second self-cleaning method is to drive the filter barrel 2 to switch forward and reverse; or to shake the filtered dirt off the surface of the filter screen 1 by switching between rotation and stop. The degree of clogging of the filter corresponding to the self-cleaning mode.

The present invention is not limited to the above two levels of self-cleaning methods, there are also three or four levels; according to the degree of clogging, the rotation speed of the filter barrel is controlled to realize self-cleaning. , Control the water pressure to achieve self-cleaning.

Embodiment seven

As shown in Figure 6, the washing machine of the present invention includes but is not limited to a wave-wheel washing machine and a drum washing machine. The washing machine includes an outer tub 7 of the washing machine and a filtering device 8. The device 8 includes a filter chamber 3 and a filter barrel 2 arranged in the filter chamber 3, the filter chamber 3 is provided with a filter water inlet 31, and a filter water outlet 32 for discharging filtered water to the outer barrel 2 And discharge the sewage from the clean filter screen to the external sewage outlet 33, the two ends of the filter barrel 2 are pivotally connected with the filter chamber 3, one end is a rotating water outlet joint 21, and the other end is axially sealed, and the filter water outlet 32 is rotated The water outlet joint 21 communicates with the inside of the filter bucket 2 .

Embodiment eight

This embodiment is a further improvement of Embodiment 7: as shown in Figure 6, a flocculation device 9 is provided between the outer tub 7 of the washing machine and the filter device 8, and the flocculation device 9 includes a flocculation chamber 91 communicated with the outer tub 7. The outer barrel 7 is drained to the flocculation chamber 91 for flocculation treatment; the flocculation chamber 91 is connected with the filter chamber 3, and the water after flocculation treatment by the flocculation device 9 enters the filter chamber 3 and is discharged into the outer barrel 7 for circulation after being filtered by the filter barrel 2 use.

Embodiment nine

As shown in Figures 1 and 5, the filter barrel 2 in this embodiment is vertically arranged in the filter chamber 3, the rotary joint 21 is arranged at the bottom of the filter barrel 2, and the filter outlet 32 is correspondingly arranged at the bottom of the filter chamber 3 . This structure effectively utilizes water pressure and gravity to flush the filter screen, and the filter screen is cleaned more cleanly.

Embodiment ten

As shown in Fig. 2 and Fig. 3, the difference between this embodiment and the above-mentioned ninth embodiment is that: the axis L of the rotation of the filter bucket 2 and the horizontal plane R have an inclined angle α, 0≤α≤30°, preferably 1°≤α≤10°, preferably 1°≤α≤3°, the rotary joint 21 is located at the lower end of the filter barrel 2; by tilting or placing the filter barrel horizontally, not only the filtering area can be increased, but the filtering speed can be accelerated , but also conducive to filter cleaning.

The structure can be realized in the following ways: 1. The filter chamber is arranged horizontally, and the filter barrel is arranged obliquely; 2. The filter chamber and the filter barrel are arranged obliquely together, and a support base is provided under the filter chamber.

Compared with the vertical arrangement of the filter bucket in Embodiment 9, the advantages of the filter bucket in this embodiment are: 1. The filter area can be increased; 2. The force of the water spray is uniform and the rotation is stable; 3. The flocculation and filtration are uniform, not easy to be blocked, and easy to clean wide range.

Embodiment Eleven

As shown in Figure 6, the working process of washing machine circulating water treatment in the present invention: the sewage after washing enters the flocculation device 9, and after adding flocculant and stirring, flocculation water will be obtained, and then the flocculation water enters the filter chamber 3 through the pipeline, and in the filter chamber 3, obtain clean water through the filter link, and these clean water are returned to the outer barrel 7 of the washing machine by the pipeline.

After the flocculation process of the laundry sewage, most of the flocs will float on the upper part of the flocculation chamber 91. If the flocculation effect is not ideal, the flocs will be suspended in the flocculation chamber 91 or even sink to the bottom. At this time, if the flocculated water is put into the filter chamber 3 through the pipeline, the flocculated water will enter the filter chamber 3 with a small amount of flocs, and the flocs entering the filter chamber 3 will be adsorbed on the surface of the filter screen 1, and the filtered Net 1 is blocked, in this case, the speed of clear water discharged from filter outlet 32 of filter chamber 3 will slow down or even stop; at this time, stop the process of circulating water treatment and start the self-cleaning process.

The implementations in the above examples can be further combined or replaced, and the examples are only descriptions of preferred embodiments of the present invention, and are not intended to limit the concept and scope of the present invention. Various changes and improvements to the technical solutions of the present invention made by those skilled in the art belong to the protection scope of the present invention.

Claims (12)

1. a filter mesh for washer self cleaning method, screen pack is located at the surface of filter vat, and filter vat is located in filtering chamber rotationally, it is characterized in that: by driving the different rotating manner of filter vat to remove the filtering contaminants on screen pack surface.

2. a kind of filter mesh for washer self cleaning method according to claim 1, is characterized in that: drive the different rotating manner of filter vat be drive the change of filter vat rotating speed and/or turn stop than change and/or rotation direction switching and/or drive the change of filter vat acceleration.

3. a kind of filter mesh for washer self cleaning method according to claim 1 and 2, is characterized in that: drive filter vat to rotate by motor.

4. a kind of filter mesh for washer self cleaning method according to claim 3, is characterized in that: drive filter vat vibrations to make the filtering contaminants on screen pack surface come off by controlling motor with the method for operation of crawl or shake.

5. a kind of filter mesh for washer self cleaning method according to claim 1 and 2, is characterized in that: drive filter vat to rotate by water inlet current.

6. a kind of filter mesh for washer self cleaning method according to claim 5, is characterized in that: cleaning showers screen pack while utilizing water inlet current to drive filter vat to rotate.

7. a kind of filter mesh for washer self cleaning method according to claim 5, is characterized in that: the angle controlling the change of intake pressure and/or the start and stop of water inlet and/or flushed lauter tub of intaking different realizes the different rotating manner of filter vat.

8. a kind of filter mesh for washer self cleaning method according to claim 1, is characterized in that: in the process driving filter vat to rotate, water inlet cleaning showers screen pack.

9. a kind of filter mesh for washer self cleaning method according to claim 1, is characterized in that: according to different screen pack chocking-up degrees, the automatically cleaning mode of setting different brackets.

10. a kind of filter mesh for washer self cleaning method according to claim 9, it is characterized in that: the automatically cleaning mode at least comprising two kinds of grades, the first automatically cleaning mode is drive filter vat, in the mode of shake or crawl, filtering contaminants vibrations are departed from screen pack surface;

The second automatically cleaning mode switches for driving filter vat rotating; Or by turning to stop switching, filtering contaminants is thrown away screen pack surface, screen pack chocking-up degree corresponding to the first automatically cleaning mode described is lower than screen pack chocking-up degree corresponding to the second automatically cleaning mode.

11. 1 kinds have as arbitrary in claim 1-10 as described in the washing machine of dust gauze self-cleaning method, comprise outer barrel of washing machine and filter, it is characterized in that: described filter comprises filtering chamber and is located at the filter vat in filtering chamber, described filtering chamber is provided with filtered water inlet mouth, water after filtering is expelled to outer barrel filter out the mouth of a river and the sewage of cleaning filter net discharged outside sewage draining exit, described filter vat two ends and filtering chamber pivotally connected, its one end is rotary water-out joint, other end sealing, filter out the mouth of a river to be communicated with filter vat inside by rotary water-out joint.

12. washing machines according to claim 11, is characterized in that: between outer barrel of washing machine and filter, be provided with flocculation plant, and flocculation plant comprises the flocculation chamber be communicated with outer barrel, by flocculation treatment in outer barrel draining to flocculation chamber; Flocculation chamber is communicated with filtering chamber, and the water after flocculation plant flocculation treatment enters filtering chamber after lauter tub filters, enters the use of outer barrel Inner eycle.